以前就有的bug

app/Http/Controllers/Api/ConditionsController.php

@@ -169,11 +169,15 @@ class ConditionsController extends BaseController
         $info['content'] = $info['content'] ?? '';
         if (!empty($info['addresss'])) {
             $address_name = explode(',',$info['addresss']);
-            $info['addresss'] = $address_name[0].$address_name[1];    
+            $info['addresss'] = '';
+            $info['addresss'] .= $address_name[0] ?? '';
+            $info['addresss'] .= $address_name[1] ?? '';
         }
         if (!empty($info['registration'])) {
             $registration_name = explode(',',$info['registration']);
-            $info['registration'] = $registration_name[0].$registration_name[1];    
+            $info['registration'] = '';
+            $info['registration'] .= $registration_name[0] ?? '';
+            $info['registration'] .= $registration_name[1] ?? '';
         }
         $settings = $this->getSettings(2);
         // 获取用户的名称